Filling tension means for looms.



No. 835,044. PATENTED NOV. 6, 1906.

' E. s. STIMPSON.

FILLING TENSION MEANS FOR LOOMS. nrmonxon 11.21) NOV.15, 1905.

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rovided means to frictlonally UNITED ST S "EDWARD s. STIMPSON, DRAPER COMPANY, TION or MAINE.

FILLING TENSION MEANS FOR LOOMS- To all whom, it may concern.-

Be it known that I, EDWARD S. STIMPSON,

a citizen of the United States, and a resident of Hopedale, county of Worcester, State of Massachusetts, have invented an Improvement in Filling Tension Means for Loom- Shuttles, of which the following description, in connection with the acconi anying drawings, is a specification, like etters on' the drawings representing like parts.

This invention has for its object the production of novel means for exerting tension upon the filling-thread in a loomshuttle,-dispensing with the use of felt, flannel, springacting devices, or the like, all of which have heretofore been employed to exert a drag on the filling-thread as it draws through the thread-passage leading to the delivery-eye of the shuttle.

My invention is particularly adapted for use 111 automatically self-threading shuttles wherein the filling is changed automatically, as in the Northroptype of loom, one example of which is found in United States Patent No. 529,940. Such shuttles are provided with a self-threadingdevice or block which is so constructed and arranged as to automatically direct the fresh filling-thread into a longitudinal tluead-passage and thence to the delivery-eye of the shuttle, provision being. made to prevent accidental unthreading while the shuttle is in use.

For convenience of illustration and also because of its ready adaptation thereto I have herein shown my invention embodied in a loom-shuttlc having a self-threading device Substantially like that forming the subject-matter of United States Patent to Northrop, No. 769,914, dated September 13, 1904. In accordance with m invention I have engage and deflect the filling-thread from a straight path as it draws throu h the thread-passage, the irregular and Su stantially zigzag course; thus imparted to the thread exerting the re uisite drag or tension thereupon. he various novel features of my invention will be fully described in the subjoined, specification and particularly pointed out in the following claims.

, Specification of Letters Patent.

A lic ti n fil d November 15, 1905. Serial No. 287,397-

, ance 11, which completes the inlet.

Figure 1 a top plan view of asufiicient Patented Nov. 6, 1906.

portion of a loom-shuttle and the self-threading device to be understood with one practical embodiment of m invention applied thereto. Fig. 2 is an e arged top plan view in full lines ofone-half of the threading device, the opposite side and the tensionmeim bers being shown in dotted lines; Fig. 3 is an inner side view of the half of the threading.

device shown in full lines, Fig. 2. Fig. 4 is a sideelevation of the threading device, show ing the outer face of the side illustrated in dotted lines, Fig. 2. Fig. 5' is a rear end elevation of the threading device. Fig. 6 is'a front end elevation thereof, and Fig. 7 is a. 6 5 loiigitudinal horizontal section on the line.7 7, i 5.

Th ie shuttle-body A, open at to and bottom to' receive the filling-carrier and hav-' I ing a side-delivery-eye a is provided atits 7o opposite end with suitable means (not shown) to grasp and hold in pro er osition the head of the filling-carrier, al Su stantially asin said Patent No. 769,914, the front end ofthe shuttle-body being cut out beyond the tip of. 7 5- the filling-carrierito receive the threadingdevice or block. The latter, made of metal, comprises a base portion 1, upturned sides 2 3, and a tubular longitudinal threadasa sage 4, and on the inner face of the si e 3 I form a longitudinal rib or ledge 5, which at its front end is broadened to present acon v vexed and downwardly-sloping shelf 6, over-' hanging the thread-passage.

A ledge 7 is formed on the inner, face of the side 2 above the thread-passage, (see Figs. 1., 4, and 5), and at the front end of the thread-passage a convexed and sloping shelf 8 is provided, the two ledges 5 and7 closely approaching each other to present a narrow straight clearance 9,,forn1ing'a part of the inlet to the thread-passage. The two shelves 6 and 8 are adjacent each other, and the shelf 6 approaches a concave portion '10 in" the side *2, so as to form an irregular clear- 5 Above the ledges 5 and 7 the sides 2 and 3 are l ongitudinally concaved to form a speciesof vestibule 12, Fig. 5, above the innerend of the thread-passage, and an-elongated ioo guard-13 overhangs the straight art 9 of the inlet substantially as in Patent 0.769314.

the front edge of the guard being shown in Fig. 1 as eoncaved and terminating in a forwardly-prolonged finger 14. Said finger lies ver close to the sloping top of the shelf 6 an as in the patent referred to, acts, in connection with the coneaved edge of the guard, as a leader to enable the filling-thread to be properly delivered independently of the delivery-eye of the shuttle upon failure of the device to promptly thread the shuttle.

The beak and shield 16 are substantially as in said patent, and the horn 17, Figs. 4 and 6, guides the thread downward into the notch 18 back of the point of the horn, when the threading is pro erly accomplished.

-I have provi ed means to exert drag or tension upon the filling-thread as it draws through the thread-passage 4, said means herein comprising three upright friction members, which engage the filling-thread and deflect it from a straight path, the friction so produced causing the requisite degree of ten sion. To this end a pin 19 is driven upward through the base 1 into the ledge 7, and a sec ond pin 20 is similarly driven through the base and up into the shelf 8, both of said pins being on the same side of the inlet 9 11 and at or near the ends of the thread-passage. The latter is thus reduced in width, as shown in Figs. 5 and 6, the member or pin 20 crossing the notch 18 and guiding the filling-thread t as it passes out through thedelivery-eye a of the shuttle, the thread turning around the pin 20 substantially at right angle. (See Fig. 1.)

The third friction member is formed by a bar-like extension 21, depending from the shelf 6 and extending to the bottom of the thread-passage, and preferably made intogral with said parts, the friction face of said member 21 being overhung by the edge of the shelf, (see Fig. 2,) sothat an additional guard is provided to prevent accidental re- 'moval of the thread. Said member 21 is on the opposite, side of the inlet 9 11 from the members 19 and 20,so that the filling-thread is deflected from a straight path (see Figs. 1 and 7,) Cs it draws through the thread-passage and travels in a zigzag manner, as shown. the friction exerted on the thread by this de flection effecting the desired tension.

When the shuttle is to be threaded, the filling-thread is normally drawn down under theguard 13 and finger 14 and, passing between the shield ]6 and beak 15, enters the vestibule 12, the thread thence slipping through the straight part 5) of the inlet. The sloping shelves 6 and 8 direct the thread downward. and, in connection with the horn 17, direct the thread through the irregularlycurved part 11 of the inlet into the threadpassage. As the thread passes through the inlet part 5) it is l'rictionally engaged by the pin 19, and when the thread passes through the part 11 of the inlet the members 20 and 21 frictionally engage the same and complete the deflection. (Shown by dotted lines, Figs. 1 and 7.)

I prefer to make the threading device or block in two arts, separated along the line 9:, Figs. 5 and 6, in order to properly insert the pins 19 and 20 and to form the extension 21 of the shelf 6, thereafter uniting the parts by soldering, brazing, or in other suitable manner.

So far as my invention is concerned it is not restricted to the particular form of threading device or blockiherein illustrated, as other forms may be use or the finger 14 may be omitted, thereby dispensing with the leader feature without interfering with the operation of my resent invention.

Having fu ly described my invention, what I claim as new, and desire to secure by Letters Patent, is

' 1. In a loom-shuttle having a delivery-eye and adapted to contain a supply of filling, a self-threading device provided with a longitudinal thread-passage, having a narrow, 1rregular inlet, means to automaticall direct the filling-thread through the inlet into the thread-passage and thence to the deliverye e, upright friction members at one side of the inlet in and near the ends of the threadpassage, an intermediate member on the opposite side of the inlet and having its acting face out of alinement with the-acting faces of the other two members, and a guard overhanging said intermediate member, the three members deflecting the filling-thread into a zigzag path as it draws through the said passa e.

2. In a loom-shuttle having a delivery-eye and adapted to contain a supply of filling, a self-threading device provide with a longitudinal thread-passage, having narrow 1nlet, and means to direct the 1 ling-thread through the inlet into the threadassage and thence to the delivery-eye, sai means in cluding a fixed guard overhanging the inner end of the inlet and terminating in a forwardl -extended, elongated finger crossing the in ct, and sloping shelves projecting from opposite walls of the thread-passage and forming at their adjacent edges a portion of the inlet, combined with friction members depending into the thread-passage from said guard and shoulders, to act from opposite sides upon the filling-thread when introduced into the passage and deflect the thread from a straight path, whereby said thread is subjected to tension as it draws through the thread-passage.

3. in a loom-shuttle having a delivery-eye and adapted to contain a supply of filling, a self-threading device provided with a longitudinal thread-passage, a longitudinal ledge of the assage, the ledges closely approachthe filling-thread and deflect it from a straight 10 mg" eac other and the shelves being stagpath as it draws through the thread-passage. ei'ed, whereby" the clearance between sald In testimony whereof I have signed my edges a d'she ves forms a narrow and irregname to this specification in the presence of 5 ular inle for the thread-passage, and three two subscribin%witness'es.

upright friction members, extending from DWARD S. STIMPSON'. the bottom of the passage to the shelves and Witnesses:

to one of the :led ges, said members being 10- GEORGE OTIS DRAPER, cated on opposite sides of the inlet, to engage ERNEST W. WOOD.. 

